In this video I compare the the three versions of the classic JMP line that Marshall currently offers in their product line up:
100W Marshall Super Lead (Model 1959SLP) The current one is HW though
50W Marshall 50W Lead (Model 1987X)
20W Marshall Studion Vintage SV20H
I'm playing all three amps through a 1971 Marshall 1960A and B Full stack, using a 1973 Gibson Les Paul Custom and a 2021 Fender Custom Shop telecaster 1960 Relic.